Ixekkama ricobdi



I. A. VALDERHAMA RICORDI.

TRACTOR.

APPLICATION FILED APILBI |918. 1,372,052. Patented Mar. 22, 1921.

mi Y "W L77?? JUAN ALBERTO VALDEREA'MA BIGOBYDI. OF NEW YORKN.

TRAGTDB.

Specification of Letters Patent.

Patented Mar. 2' 15921.

Application Bled April B, 1918. Serial No. 227,286.

To aZ whom `it may comm.'

` nnnnnni Riconm, :i citizen of the Republic of Peru, residing: at 117 Test 49th street, city, county, and Stato of New York, U. S. A., have invented new and useful Improvements in Tractors, of which the following is n secificaton.

i y invention relates to improvements in the construction of sind the driving means for .motor vehicles, end more particularly tractors.

An object of my of n tractor having n plurality of wheel trucks euch mounted for oscillatory move ment to permit the wheels to conform to any uneven surface and to thus maintain the stability of the vehicle when traveling.

Another object of my invention is the provision of o Wheelftruck of the character above described having driving Wheels mounted thereon independently of cach other. and power transmission means associated with the wheel truck for driving; the

provision. of n novel means wheels thereof in synchronisln.

Another object of my invention is the for supporting the chassis of the tractor upon the Wheel trucks. i

I will describe one form of tractor ernbodying my inventionl and will then point ont the novel features thereof in claims.

In the accompanying drawings,

` Figure 1 is a View showing in side elevation one form of tractor embodying my invention;

.Fig 2 is a view showing in top plan the tractor shown in Fig, 1; and

Fig. 3 is a view showing in end elevation the tractor shown in the preceding views,

looking et the'leit-hand end of Figs. 1 and 2.

Similar reference characters refer to similar parts 'in each of the several views.

Referring to the drewn in detail, and particularly to Fig. 2.`A esignates genor- :illy n chassis which, as here shown, com prises end rails `5 and side rails 6 connected end to end and arranged in 'the vform of n rectangle. The chassis A is supported ad jacent its opposite ends hy semielliptical springs 7, R and 8. The springs 8 and il extend longitudinnllv of the chassis and are suspended-in dependin relation thereto by means of brackets 9, w iilespring 7 extends transversely of the chassis and is pivqtally connected et its medial portion, as et 10,

invention is the provision to u king holt ltl which latter is in turn rotatably mounted on the cross ber il., es shown in Fig. 3. T he spring 7 is supported .upon and connected to :in axle B, as" shown in Fig. 3, 2l while springs 8 and S are Supported :it their medial portions bv another :xxlc li. Such on nrrnngement ot' lsprings affords an extremely resilient support for the chassis und thus minimizes the vibra tions to which i treft-:rr chassis is usnollv snbircted. i

The chassis is primarily supported bv means of the iixles B and li, which axles extend transversely of the chassis and have their o posits. ends jimi-nailed in wheel trucks esiginited generally n t". .is here Shown. each wheel truck comprises speced pnrallel L-hars l2 und i2 ominectcd :et their opposite ends lijf @nb-:titles 13, journoled in hearings 1.2i, und :it their medial portions hy n Abruce 4haar it. as clenrlvslirm'n in Fig. Q. Journnied on noli stub fiile 1?.- isetrector wheel 15. which wheel is of the usual con struction and forms no port of the present invention. Secured to the medial portion of the Liner it?" is e journal 'nox i6 in. which one end of the axle B or l5 is jonrnaled. This mounting;` permits each entire truck C to rock or osciilate nliont the axle li T as n center so tlnii the wheels 1.5i orc in con stent contact with the ground thereby main-- taining the stability,r of the chassis .i when traveling over uneven surfaces. By providing the chassis with fom' such Wheel. trucks arranged :is shown in Fig. il and each having mounted thereon two wheelsfl pro duce n mounting which will equalize the most uneven Surfaces over which e tract-or travels, thus maintaining the st'ahility of the tractor nt all times.

F or driving;r the tractor, provide power transmission means for synchrononsl driving the Wheels 15 oi' each truck C, so tlint the tractor is provided with eight driving wheels. As here shown, this power transmission comprises e driving gear l? iixed to n. shaft 18 journalcd in beatings i9 and 20. The inner end of the shaft 18 is operatively connected to n power shaft P by n. universal joint J, the letter being of suitable form to permit the shaft P to properly drive the shaft 18 when the letter is in any of the positions which it assumes als aresnlt of the movement of the wheel truck when the wheels are traveling overan uneven surface. The outer bearing 19 is supported between the upper ends of a pair of vertically dis posed standards 21, which standards are incliiied toward each other as clearly 'Shown in liig. 1 and have their lower ends bent in opposite directions to lie in a horizontal p ane, and secured to the outer bar l2 by means of bolts. The inner bearin 20 is formed in the upper end of an upright 22, which lutter is secured at its lower end to the inner bar 12". As shown in Fig. 3, the4 iipri ht 22 is inclined toward the standard 2l, the up )er end being arranged in paral lelsin witli the standard. Fixed to each stub-axle at a point between a corresponding wheel 15 and the outer bar 12 is a relatively large driven gear 23, and trained about the gears 23 oi' each pair of wheels and the correspoiidiinir driving gear i7 is an endless chain 2-1 Awhich is shown iliagrainmiitieally in all of the views by the dot and dash lines. Power in :mil .suitable manner is applied to the power shaft l whereby the wheels 15 oi' each truck are driven in synchronisni, Owingr to the fact that the entire driving,r means is mounted entirely on each wheel truck C, a constant drive is maintained ir'i'espective of any position a truck may assume when traveling over uneven surfaces.

It will be manifest frdm the foregoing description taken in conjunction `with the accompanying drawings that, should the wheels encounter any obstruction or sink into a rut, the vertical movement thereof will not be transmitted to the chassis so as to impart n violent shock to the same, as the vertical movement of the wheels will be :ic- .zfonnnodated by the pivotal mounting of the corresponding wheel truck, wherefore it will be evident that by providing four Separate and independent wheel trucks, I "preventthe most severe shocks and provide a tractor which is ca able of traversing very rugged country ii'iti substantially no displacement of or shock to the chassis.

Although l have herein shown and described'only one forni of tractor embodying my invention, it is understood that various changes and modifications may be made within the scope of the appended claims without departing from the spirit and scope of this invention.

What I claim is:

l. In combination, u chassis, shafts supporting said chassis, trucks mounted for oscillatory movement upon the opposite ends 'of said shafts, each truck comprising spaced parallel bars connected at their opposite ends by stubaxles, standards fixed to the outer bar of said bers, an upright fixed to the inner ber of said bars and spaced from said standards; wheels fixed to each of said stub-axles, e driven gear fixed to each oi' said stub-axles, a driving gear journaled in said upright and standards, and means for operative f connecting said driving and driven gears.

2. In combination, a chassis, a pair of shafts supporting said chassis, :i semi-ellipA tical spring interposed between one of said shafts and said chassis and arrangedtrans verseiy of the latter, a pair of sprmgsinterposed between the second shaft and said chassis and extending lon itudinally of the latter, wheel trucks pivots, ly mounted upon the o posits ends of said shafts, wheels jonrnale' in said trucks and power transmission means carried by each of said wheel trucks for driving the wheels thereof.

In testimony whereof I have signed my name to this specification.

JUAN ALBERTO VALDERRAIIA RICORDI. 

